4621 E Guasti Rd (Rexford Ab 802)
Distribution Center in California, CA · 4621 East Guasti Road, Ontario · 91761
At a glance
4621 E Guasti Rd (Rexford Ab 802) is a 64,512-square-foot distribution center at 4621 East Guasti Road, Ontario in Ontario, California, built in 1988. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 57 out of 100 (grade C), a site energy-use intensity of 7.1 kBtu/ft² and 30 tCO₂e of greenhouse-gas emissions. That score is higher than 31% of the 2,485 scored distribution center buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 57 (band C) |
| Site EUI | 7.1 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 30 tCO₂e |
| GHG intensity | 0.5 kgCO₂e/ft² |
| Electricity | 133,311 kWh |
| Gross floor area | 64,512 sq ft |
| Source record | california:19414752:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 57 | +1 | 7.1 kBtu/ft² | 30 tCO₂e |
| 2023 | 56 | -1 | 8.0 kBtu/ft² | 37 tCO₂e |
| 2022 | 57 | -7 | 7.8 kBtu/ft² | 35 tCO₂e |
| 2021 | 64 | 6.8 kBtu/ft² | 27 tCO₂e |
Compliance context
AB 802 (Public Resources Code §25402.10)
AB 802 requires every California commercial building over 50,000 sq ft to report energy use to the CEC annually; the CEC publicly discloses the results statewide.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 4621 East Guasti Road, Ontario
- City
- California
- State
- California
- ZIP
- 91761
- Coordinates
- 34.06640, -117.55197
Within ~1 km
Nearby benchmarked buildings
- 5218-1 Mills Cir (Main Mall)score —
Lifestyle Center · 1,900,000 sq ft
- Ontario Millsscore —
Enclosed Mall · 1,303,110 sq ft
Enclosed Mall · 951,541 sq ft
- 5218-Ontario Millsscore —
Retail Store · 886,777 sq ft
- Dpi - 601 S Rockefellerscore 40
Refrigerated Warehouse · 252,800 sq ft
Manufacturing/Industrial Plant · 237,302 sq ft
See also: most efficient in California · biggest emitters
How does 4621 E Guasti Rd (Rexford Ab 802) compare with other distribution center buildings in California?
The latest disclosures cover 3,121 distribution center buildings in California, out of 40,029 buildings citywide. 4621 E Guasti Rd (Rexford Ab 802)'s ENERGY STAR score of 57 compares with an average of 67 across the 2,485 that report a score; it scores higher than 31% of them and lower than 69%. Its site EUI of 7.1 kBtu/ft² is about 64% below the average of 19.8 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.5 kgCO₂e/ft² is about 64% below the group average of 1.3 kgCO₂e/ft².
At 64,512 sq ft, it is about 73% below the average floor area of 238,298 sq ft for those buildings. It was built in 1988, 6 years earlier than the group's average year built (1994). Across all 24 jurisdictions BuildingCensus covers, the 4,082 distribution center buildings average an ENERGY STAR score of 65 and a site EUI of 24.2 kBtu/ft².
How has 4621 E Guasti Rd (Rexford Ab 802)'s energy performance changed over time?
BuildingCensus holds 4 California disclosures for 4621 E Guasti Rd (Rexford Ab 802), covering report years 2021–2024. Its ENERGY STAR score went from 64 in 2021 to 57 in 2024 (-7 points); its best year on file was 2021, at 64. Site EUI moved from 6.8 kBtu/ft² (2021) to 7.1 kBtu/ft² (2024), an 4% increase. Reported emissions went from 27 tCO₂e to 30 tCO₂e over the same span (up 13%).
What does an ENERGY STAR score of 57 mean?
ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 57 means the building performs better than about 57% of its national peers. BuildingCensus bands the score into report-card grades; 57 falls in band C — below median (55–69). It sits 18 points below 75, the threshold for ENERGY STAR certification. In California, 65% of scored buildings are at 75 or above.
Site energy-use intensity (EUI) is the energy a building uses on site in a year divided by its floor area, in thousand Btu per square foot — lower is more efficient. 4621 E Guasti Rd (Rexford Ab 802)'s 7.1 kBtu/ft² across 64,512 sq ft works out to about 0.5 billion Btu (134 MWh-equivalent) in 2024. The disclosure also reports 133,311 kWh of electricity for the year.
Which law requires 4621 E Guasti Rd (Rexford Ab 802) to report its energy use?
4621 E Guasti Rd (Rexford Ab 802) reports under AB 802 (Public Resources Code §25402.10), the legal basis of California's Building Energy Benchmarking Program (statewide), which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record california:19414752:2024). AB 802 requires every California commercial building over 50,000 sq ft to report energy use to the CEC annually; the CEC publicly discloses the results statewide.
More distribution center buildings in California
- Siv San Marcos North Sd, Llc - 01· 64,336 sq ft · score 36 (D)
- 2734 E 46Th St· 64,299 sq ft · score 86 (A)
- 29001 Hopkins Street· 64,298 sq ft · score 46 (D)
- Artesia Distribution Center - 2337 W. Commonwealth· 64,292 sq ft · score 86 (A)
- Ups Rocklin Caroc· 64,288 sq ft · score 19 (D)
- 6600 - 6600 Bandini Blvd· 64,231 sq ft · score 76 (B)
- Distribution Center buildings in California· 3,121 benchmarked
- All California benchmarked buildings· AB 802 (Public Resources Code §25402.10)
- Most efficient large buildings in California
- Least efficient large buildings in California
- Biggest emitters in California
Frequently asked questions
What is 4621 E Guasti Rd (Rexford Ab 802)'s energy grade?
4621 E Guasti Rd (Rexford Ab 802) scores 57 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 4621 E Guasti Rd (Rexford Ab 802) use?
Its 2024 site energy-use intensity was 7.1 kBtu/ft² across 64,512 sq ft, including 133,311 kWh of electricity.
What are 4621 E Guasti Rd (Rexford Ab 802)'s carbon emissions?
4621 E Guasti Rd (Rexford Ab 802) reported 30 tCO₂e of greenhouse-gas emissions (0.5 kgCO₂e/ft²) for 2024.
Where is 4621 E Guasti Rd (Rexford Ab 802)?
4621 E Guasti Rd (Rexford Ab 802) is at 4621 East Guasti Road, Ontario, in Ontario, California 91761. Its coordinates are 34.06640, -117.55197 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 4621 E Guasti Rd (Rexford Ab 802) and when was it built?
4621 E Guasti Rd (Rexford Ab 802) has 64,512 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1988 as its year built. It is classed as distribution center.
Is 4621 E Guasti Rd (Rexford Ab 802) covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2024 Building Energy Benchmarking Program (statewide) disclosure, which lists the buildings reporting under AB 802 (Public Resources Code §25402.10).
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About this data
Source: Building Energy Benchmarking Program (statewide) (AB 802 (Public Resources Code §25402.10)), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “4621 E Guasti Rd (Rexford Ab 802), Ontario, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/4621-e-guasti-rd-rexford-ab-802-e3e1f404 (data as of July 9, 2026).